Two teenage girls in a relationship were found with gunshot wounds to the head in a south Texas park. One died from her injuries.

Police were searching for their assailants.

Mollie Judith Olgin, 19, and Mary Christine Chapa, 18, were found in knee-deep grass in a nature area in Portland by a couple on June 23, said Portland Police Chief Randy Wright, who confirmed details first reported by the Corpus Christi Caller Times.

Wright told the Caller-Times, "There are some crimes that are just senseless. We've had homicides, but we haven't had this type of murder in many years — nothing of this magnitude."

Olgin, originally from Ingleside but more recently a resident of Corpus Christi, died. Chapa, of Sinton, was rushed to a hospital where she had surgery and was in serious but stable condition on June 24. She was still in the hospital on June 25.

Friends said the girls had been together five months.

The park was mostly frequented by visitors during the day. It is located along a bluff overlooking a bay.

Neighbors told police that they heard what could have been gunshots on June 22. Bullet casings were recovered at the scene.

Longtime gay rights activist Cleve Jones was organizing a vigil in San Francisco at Harvey Milk Plaza for June 27.

Jones announced, “Last Friday, as millions of LGBT people and their allies were celebrating Pride, something awful happened in Portland, Texas. We need to respond publicly to this tragedy. Whoever shot Mary Christine Chapa and Mollie Judith Olgin, whatever the motive, regardless of where it happened, two beautiful girls were shot and one was killed. We need to honor the memory of Mollie and pray for the recovery of Mary...Mary and Mollie loved each other. Now we need to show our love for them and their families and friends.”